/* This is just an example. You shouldn't do this. */
menuitem#mnu_{appname} {
  color: red !important;
}

#{appname}-contextmenu {
    list-style-image: url("chrome://{appname}/skin/qr16.png");
}
#{appname}-contextmenu-a {
    list-style-image: url("chrome://{appname}/skin/qr16.png");
}